ILISP is a powerful GNU Emacs interface to many dialects of Lisp,
including Lucid, Allegro, Harlequin LispWorks, GCL, KCL, AKCL, ECL, IBCL,
and CMUCL. Also some Scheme implementations are supported as well as
a preliminary version of Xlisp/XlispStat.
A version of ILISP is available at http://sourceforge.net/projects/ilisp/.